<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
    <h1>修改商品页面</h1>
    <input type="text" v-model="p.id">
    <input type="text" v-model="p.title">
    <input type="text" v-model="p.price">
    <input type="text" v-model="p.num">
    <input type="button" value="修改" @click="update()">
</div>
<!--引入axios和vue框架文件-->
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
<script>
    let v = new Vue({
        el: "body>div",
        data: {
            p: {id: "", title: "", price: "", num: ""}
        },
        methods: {
            update() {
                //发出异步修改请求
                axios.post("/update", v.p).then(function (response) {
                    //显示到列表页面
                    location.href = "/list.html";
                })
            }
        },
        created: function () {
            //发请求通过商品id查询商品信息   location.search = ?id=6
            axios.get("/selectById" + location.search).then(function (response) {
                //服务器端响应的是Java对象
                //客户端得到的是JS对象
                v.p = response.data;
            })
        }
    })
</script>
</body>
</html>